Display apparatus

Patent metadata

Field	Value
Publication number	US-11088208-B2
Application number	US-201916600440-A
Country	US
Kind code	B2
Filing date	Oct 11, 2019
Priority date	Nov 19, 2018
Publication date	Aug 10, 2021
Grant date	Aug 10, 2021

Abstract

A display device comprises a substrate provided with a first subpixel area and a second subpixel area, a first electrode provided on the substrate, including a first sub electrode provided in the first subpixel area and a second sub electrode provided in the second subpixel area, an organic light emitting layer including a first organic light emitting layer arranged on the first sub electrode and a second organic light emitting layer arranged on the second sub electrode, and a second electrode arranged on the organic light emitting layer, wherein the first organic light emitting layer includes a first pattern layer, a second pattern layer provided on the first pattern layer and a third pattern layer provided on the second pattern layer, the second organic light emitting layer includes a first pattern layer, a second pattern layer provided on the first pattern layer and a third pattern layer provided on the second pattern layer, the first pattern layer of the first organic light emitting layer is spaced apart from the first pattern layer of the second organic light emitting layer, the second pattern layer of the first organic light emitting layer is spaced apart from the second pattern layer of the second organic light emitting layer, and the third pattern layer of the first organic light emitting layer is connected with the third pattern layer of the second organic light emitting layer, and the second pattern layer of the first organic light emitting layer is provided to cover an upper surface and a side of the first pattern layer of the first organic light emitting layer. Therefore, a damage of the light emitting layer can be reduced.

First claim

What is claimed is:

1. A display device comprising:
a substrate provided with a first subpixel area and a second subpixel area;
a first electrode provided on the substrate, and including a first sub electrode provided on the first subpixel area and a second sub electrode provided on the second subpixel area;
an organic light emitting layer including a first organic light emitting layer arranged on the first sub electrode and a second organic light emitting layer arranged on the second sub electrode;
a second electrode arranged on the organic light emitting layer; and
a first bank provided between the first sub electrode and the second sub electrode and partitioning the first subpixel area and the second subpixel area from each other,
wherein the first organic light emitting layer includes a first pattern layer, a second pattern layer provided on the first pattern layer and a third pattern layer provided on the second pattern layer,
wherein the second organic light emitting layer includes a first pattern layer, a second pattern layer provided on the first pattern layer and a third pattern layer provided on the second pattern layer,
wherein the third pattern layer of the first organic light emitting layer is connected with the third pattern layer of the second organic light emitting layer,
wherein the second pattern layer of the first organic light emitting layer is provided to cover an upper surface and a side of the first pattern layer of the first organic light emitting layer, and
wherein the first pattern layer and the second pattern layer of the first organic light emitting layer and the first pattern layer and the second pattern layer of the second organic light emitting layer are arranged on an upper surface of the first bank, the first pattern layer of the first organic light emitting layer and the first pattern layer of the second organic light emitting layer are spaced apart from each other on the upper surface of the first bank and the second pattern layer of the first organic light emitting layer and the second pattern layer of the second organic light emitting layer are spaced apart from each other on the upper surface of the first bank.

2. The display device of claim 1 , wherein the first pattern layer of the first and second organic light emitting layers includes a hole injecting layer and a hole transporting layer provided on the hole injecting layer, and both ends of the hole injecting layer and the hole transporting layer match each other.

3. The display device of claim 1 , wherein the first pattern layer of the first and second organic light emitting layers includes a hole injecting layer and a hole transporting layer provided on the hole injecting layer, and the hole transporting layer is provided to cover an upper surface and a side of the hole injecting layer.

4. The display device of claim 1 , wherein the second pattern layer of the first and second organic light emitting layers includes a light emitting layer and a hole blocking layer provided on the light emitting layer, and both ends of the light emitting layer and the hole blocking layer match each other.

5. The display device of claim 1 , wherein the second pattern layer of the first and second organic light emitting layers includes a light emitting layer and a hole blocking layer provided on the light emitting layer, and the hole blocking layer is provided to cover an upper surface and a side of the light emitting layer.

6. The display device of claim 1 , wherein the third pattern layer of the first and second organic light emitting layers is provided to respectively cover an upper surface and a side of the second pattern layer of the first and second organic light emitting layers.

7. The display device of claim 6 , wherein the third pattern layer of the first and second organic light emitting layers includes an electron transporting layer provided to cover the upper surface and the side of the second pattern layer of the first and second organic light emitting layers respectively, and an electron injecting layer provided to cover an upper surface and a side of the electron transporting layer.

8. The display device of claim 6 , wherein the third pattern layer of the first and second organic light emitting layers includes an electron transporting layer provided to respectively cover an upper surface and the side of the second pattern layer of the first and second organic light emitting layers, and an electron injecting layer provided to cover an upper surface and a side of the electron transporting layer, and the electron transporting layer and the electron injecting layer are provided with a same pattern.

9. A display device comprising:
a substrate provided with a first subpixel area and a second subpixel area;
a first electrode provided on the substrate, and including a first sub electrode provided on the first subpixel area and a second sub electrode provided on the second subpixel area;
an organic light emitting layer including a first organic light emitting layer arranged on the first sub electrode and a second organic light emitting layer arranged on the second sub electrode;
a second electrode arranged on the organic light emitting layer;
a first bank provided between the first sub electrode and the second sub electrode, partitioning the first subpixel area from the second subpixel area; and
a second bank provided between the second sub electrode and the third sub electrode, partitioning the second subpixel area from the third subpixel area,
wherein the first organic light emitting layer includes a first pattern layer, a second pattern layer provided on the first pattern layer and a third pattern layer provided on the second pattern layer,
wherein the second organic light emitting layer includes a first pattern layer, a second pattern layer provided on the first pattern layer and a third pattern layer provided on the second pattern layer,
wherein the first pattern layer of the first organic light emitting layer is spaced apart from the first pattern layer of the second organic light emitting layer, the second pattern layer of the first organic light emitting layer is spaced apart from the second pattern layer of the second organic light emitting layer, and the third pattern layer of the first organic light emitting layer is connected with the third pattern layer of the second organic light emitting layer, and
wherein the second pattern layer of the first organic light emitting layer is provided to cover an upper surface and a side of the first pattern layer of the first organic light emitting layer,
wherein the substrate includes a third subpixel area adjacent to one side of the first subpixel area or the second subpixel area, the first electrode includes a third sub electrode provided on the substrate and provided in the third subpixel area, the organic light emitting layer includes a third organic light emitting layer arranged on the third sub electrode, and the first organic light emitting layer,
wherein each of the second organic light emitting layer and the third organic light emitting layer emits red (R) light, green (G) light and blue (B) light,
wherein the third organic light emitting layer includes a first pattern layer, a second pattern layer provided on the first pattern layer and a third pattern layer provided on the second pattern layer, and
wherein the third pattern layer of the first organic light emitting layer, the third pattern layer of the second organic light emitting layer and the third pattern layer of the third organic light emitting layer are connected with one another and provided to cover the first bank and the second bank.

10. A display device comprising:
a substrate provided with a first sub

Assignees

• Lg Display Co Ltd

Inventors

• Kim Daehee
• Park Jiyoung
• Choi Hyeju

Classifications

• H10K59/30

  Devices specially adapted for multicolour light emission · CPC title

• G02B27/0172 Primary

  characterised by optical features · CPC title

• G02B27/01

  Head-up displays · CPC title

• G02B2027/0178

  Eyeglass type (eyeglass details G02C) · CPC title

• H01L51/5072

  Electricity · mapped topic